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Home >> Mazda >> 2017 >> CX-5 Grand Select, FWD >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> On-Board Diagnostic - Connectivity Master Unit >> DTC U0001:88/U0100:00/U0101:00/U0104:00/U0121:00/U0131:00/U0140:00/U0151:00/U0155:00/U0182:00/U0214:00/U0235:00/U023A:00 [Connectivity Master Unit] >> Notes

DTC U0001:88/U0100:00/U0101:00/U0104:00/U0121:00/U0131:00/U0140:00/U0151:00/U0155:00/U0182:00/U0214:00/U0235:00/U023A:00 [Connectivity Master Unit]: Notes

DTC U0001:88/U0100:00/U0101:00/U0104:00/U0121:00/U0131:00/U0140:00/U0151:00/U0155:00/U0182:00/U0214:00/U0235:00/U023A:00 (CONNECTIVITY MASTER UNIT) DETECTION CONDITION AND POSSIBLE CAUSES

Description
  • U0001:88
    • Module communication error (HS-CAN)
  • U0100:00
    • Communication error with PCM
  • U0101:00
    • Communication error with TCM
  • U0104:00
    • Communication error with radar unit
  • U0121:00
    • Communication error with DSC HU/CM
  • U0131:00
    • Communication error with EPS control module
  • U0140:00
    • Communication error with front body control module (FBCM)
  • U0151:00
    • Communication error with SAS control module
  • U0155:00
    • Communication error with instrument cluster
  • U0182:00
    • Communication error with AFS control module
  • U0214:00
    • Communication error with start stop unit
  • U0235:00
    • Communication error with forward sensing camera (FSC)
  • U023A:00
    • Communication error with forward sensing camera (FSC)
Detection condition
  • U0001:88
    • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot detect a CAN bus communication line (HS-CAN) signal for 1 s or more.
      • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) detects malfunction in the CAN bus communication line (HS-CAN) 10 times continuously.
  • U0100:00
    • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the PCM for 5 s or more.
  • U0101:00
    • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the TCM for 5 s or more.
  • U0104:00
    • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the radar unit for 5 s or more.
  • U0121:00
    • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the DSC HU/CM for 5 s or more.
  • U0131:00
    • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the EPS control module for 5 s or more.
  • U0140:00
    • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the front body control module (FBCM) for 5 s or more.
  • U0151:00
    • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the SAS control module for 5 s or more.
  • U0155:00
    • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the instrument cluster for 5 s or more.
  • U0182:00
    • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the AFS control module for 5 s or more.
  • U0214:00
    • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the start stop unit for 5 s or more.
  • U0235:00
    • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the forward sensing camera (FSC) for 5 s or more.
  • U023A:00
    • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the forward sensing camera (FSC) for 5 s or more.
Fail-safe function
  • U0001:88
    • Not applicable
  • U0100:00
    • Not applicable
  • U0101:00
    • Not applicable
  • U0104:00
    • Not applicable
  • U0121:00
    • Not applicable
  • U0131:00
    • Not applicable
  • U0140:00
    • Not applicable
  • U0151:00
    • Not applicable
  • U0155:00
    • Not applicable
  • U0182:00
    • Not applicable
  • U0214:00
    • Not applicable
  • U0235:00
    • Not applicable
  • U023A:00
    • Not applicable
Possible cause
  • Malfunction in CAN bus communication line
  • Malfunction in CAN communication line between the PCM and connectivity master unit (CMU)
  • Malfunction in CAN communication line between the TCM and connectivity master unit (CMU)
  • Malfunction in CAN communication line between the radar unit and connectivity master unit (CMU)
  • Malfunction in CAN communication line between the DSC HU/CM and connectivity master unit (CMU)
  • Malfunction in CAN communication line between the EPS control module and connectivity master unit (CMU)
  • Malfunction in CAN communication line between the front body control module (FBCM) and connectivity master unit (CMU)
  • Malfunction in CAN communication line between the SAS control module and connectivity master unit (CMU)
  • Malfunction in CAN communication line between the instrument cluster and connectivity master unit (CMU)
  • Malfunction in CAN communication line between the AFS control module and connectivity master unit (CMU)
  • Malfunction in CAN communication line between the start stop unit and connectivity master unit (CMU)
  • Malfunction in CAN communication line between the forward sensing camera (FSC) and connectivity master unit (CMU)
System wiring diagram Not applicable
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